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MTAP 2 - PARASITOLOGY > Elsevier’s Medical Laboratory Science Examination Review (CHAPTER REVIEW) > Flashcards

Elsevier’s Medical Laboratory Science Examination Review (CHAPTER REVIEW) Flashcards

1
Q
  1. Trophozoite forms of amoebae are found in what type of stool specimen?

a. Formed b.
b. Loose
c. Soft
d. Watery

A

d. Watery

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2
Q
  1. Which preservation method is most suitable and the most widely used for subsequent fixed smear preparation?

a. Formalin-ethyl acetate
b. PVA
c. Trichrome
d. MIF

A

b. PVA

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2
Q
  1. If the ova of this parasite are ingested by humans, the oncosphere form can migrate through the body via the bloodstream, resulting in the condition known as cysticercosis. Which of the following is correct?

a. Taenia solium
b. Entamoeba histolytica
c. Hymenolepis nana
d. Clonorchis sinensis

A

a. Taenia solium

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3
Q
  1. Ova recovered from the stool are routinely used to diagnose infections caused by all of the following except?

a. Necator americanus
b. Ascaris lubricoides
c. Trichuris trichiura
d. Strongyloides stercoralis

A

d. Strongyloides stercoralis

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3
Q
  1. An MLS finds an E. coli cyst on a wet mount of a fresh stool specimen. Which of the following should be done?

a. Request a second specimen
b. Look for additional E. coli cysts
c. Examine the remaining area of the wet preparation
d. Generate a final report

A

c. Examine the remaining area of the wet preparation

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4
Q
  1. Which of the following parasites have migration through the lungs as part of their lifecycle?

a. Necator americanus, Ancylostoma duodenale, Strongyloides stercoralis
b. Giardia lamblia, Wuchereria bancrofti, Brugia malayi
c. Enterobius vermicularis, Trichuris trichiura, Trichinella spiralis
d. Toxocara canis, Toxoplasma gondii, Blastocystis hominis

A

a. Necator americanus, Ancylostoma duodenale, Strongyloides stercoralis

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5
Q
  1. The image below is of a suspected parasite seen on direct examination of material taken from a corneal scraping in an ophthalmology clinic. The most likely identification of the parasite
    in this specimen is which of the following?

a. Acanthamoeba sp.
b. Enterobius sp.
c. Paragonimus sp.
d. Naegleria sp.

A

a. Acanthamoeba sp.

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6
Q
  1. The organism shown below was recovered from the stool of a patient who resides in rural Texas. The most likely identification is which of the following?

a. Ascaris lumbricoides
b. Ancyclostoma duodenale
c. Necator americanus
d. Trichuris trichiura

A

d. Trichuris trichiura

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7
Q
  1. The eggs in the figure below were found in the urine of a Peace Corp worker who had just returned to the United State after spending 2 years in the Middle East. The eggs measured about 160 mm long!60 mm wide. Which of the following organisms is the most likely identity?

a. Diphyllobothrium latum
b. Schistosoma haematobium
c. Schistosoma japonicum
d. Schistosoma mansoni

A

b. Schistosoma haematobium

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8
Q
  1. A patient was diagnosed with cysts in his liver. He is originally from Australia, where he was involved in a sheep herding operation. The adult parasite shown below was passed by his pet
    dog. It measured 5 mm. What is the most likely identification of this organism?

a. Diphyllobothrium latum
b. Dipylidium caninum
c. Echinococcus granulosus
d. Taenia solium

A

c. Echinococcus granulosus

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9
Q
  1. These trophozoites were found in a trichrome stained slide of a stool sample, measuring an average of 25 microns in diameter. Which of the following is the most likely identity of this organism?

a. Endolimax nana
b. Entamoeba coli
c. Balantidium coli
d. Dientamoeba fragilis

A

b. Entamoeba coli

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10
Q
  1. The cyst in the image below was observed in a stool sample of a child at a daycare center. The ovoid cyst measures
    approximately 10x8 microns. Which organism is the most likely cause of the child’s diarrhea?

a. Chilomastix mesnili
b. Cyclospora cayetanensis
c. Giardia lamblia
d. Iodamoeba butschlii

A

c. Giardia lamblia

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11
Q
  1. The image below is a cyst found in a human fecal smear. The cyst measured about 12 mm in length and contained four nuclei and a rounded chromatoid bar. The patient had severe diarrhea and some blood in the stool. What is the most likely identification of this organism?

a. Endolimax nana
b. Entamoeba coli
c. Entamoeba histolytica
d. Iodamoeba butschlii

A

c. Entamoeba histolytica

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12
Q
  1. Match the parasite with the most appropriate description.

_____ Plasmodium falciparum
_____ Plasmodium malariae
_____ Plasmodium ovale
_____ Plasmodium vivax

a. RBC enlarged, oval, Schuffner’s dots, gametocytes seen by day 4 to 18
b. Large RBC, troph irregular, multiple phases seen, gametocytes appear early
c. Delicate ring forms, multiple rings per cell, crescent-shaped gametocytes after 7 to 10 days
d. RBC normal in size and color, troph compact, band forms may be seen, gametocytes seen after weeks

A

C, D, A, B

c. Delicate ring forms, multiple rings per cell, crescent-shaped gametocytes after 7 to 10 days
d. RBC normal in size and color, troph compact, band formsmay be seen, gametocytes seen after weeks
a. RBC enlarged, oval, Schuffner’s dots, gametocytes seen by day 4 to 18
b. Large RBC, troph irregular, multiple phases seen, gametocytes appear early

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13
Q
  1. Microfilariae found in the blood that have a sheath, demonstrate nocturnal periodicity and exhibit nuclei that do not
    extend to the tail tip are which of the following?

a. Brugia malayi
b. Onchocerca volvulus
c. Loa loa
d. Wuchereria bancrofti

A

d. Wuchereria bancrofti

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14
Q
  1. Necator americanus rhabditiform larvae can be differentiated from Strongyloides stercoralis rhabditiform larvae by:

a. Length of the notched tail
b. Length of the head region
c. Segmentation
d. Size of the genital primordium

A

d. Size of the genital primordium

15
Q
  1. Match the scientific name with the corresponding common
    name.
    _____ Sarcoptes scabei
    _____ Ixodes scapularis
    _____ P. humanus humanus
    _____ Cimex lectularius

a. Body louse
b. Bedbug
c. Scabies
d. Lyme disease

A

C, D, A, B

c. Scabies
d. Lyme disease
a. Body louse
b. Bedbug

15
Q
  1. The image below is from a fecal smear of an individual complaining of diarrhea and intestinal discomfort. The parasites were numerous and quite variable in size, but the majority
    measured about 15 to 20 mm in diameter. What is the most likely
    identification of this organism?

a. Blastocystis hominis
b. Cyclospora cayetanensis
c. Isospora belli
d. Balantidium coli

A

a. Blastocystis hominis

16
Q
  1. The only known human tapeworm with an operculum is:

a. Diphyllobothrium latum
b. Hymenolepis nana
c. Giardia lamblia
d. Schistosoma haematobium

A

a. Diphyllobothrium latum

17
Q
  1. Identify the following organism as it appears in this peripheral
    blood smear.

a. Trypanosoma sp.
b. Leishmania sp.
c. Wuchereria bancrofti
d. Loa loa

A

a. Trypanosoma sp.

MTAP 2 - PARASITOLOGY (4 decks)

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